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From: Matt Churchyard <matt.churchyard@userve.net>
To: Warren Block <wblock@wonkity.com>, "freebsd-net@freebsd.org"
 <freebsd-net@freebsd.org>
Subject: Re: Invalid subnet masks
Thread-Topic: Invalid subnet masks
Thread-Index: AdBF2FIuD1FE1aNwSWOzQAqD5/KpzwASS8SAAABl7w0=
Date: Wed, 11 Feb 2015 17:49:35 +0000
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> On 11 Feb 2015, at 17:38, Warren Block <wblock@wonkity.com> wrote:
>=20
>> On Wed, 11 Feb 2015, Matt Churchyard wrote:
>>=20
>> Just been helping someone on the forums who appears to have configured t=
heir network interface incorrectly. It looks like they've assigned 250.250.=
250.0 as the netmask.
>> I've tried assigning this netmask on a 10.1 machine and ifconfig happily=
 accepts it.
>=20
> As a tangent to that question, ifconfig(8) and the rc.conf settings do ac=
cept CIDR notation, which is both shorter and clearer than a dotted quad IP=
 address and a separate netmask:
>=20
> ifconfig em0 inet 192.168.1.1/24

Yeah I've been using that format in rc.conf for years. Quicker to type and =
looks tidy.=